Question on Carrier 58MVP080

JimEmac50

This is a 15 yr. old furnace, and after troubleshooting it gives me a code 42 which indicates ( no start on Inducer fan motor or not working at proper RPM).
Am I missing something?
I performed a diagnostic test with dip switch which turns all components on in the proper sequences of operation. Again the inducer fan doesn't turn on, the pressure switch, igniter and blower does. That would tell me that inducer fan motor is out.
Next I put my meter to the end of the small harness that connects on top of the inducer fan motor box, and I get 120 volts. It's a 2 speed inducer motor ( Low/High).
QUESTION: My guess it's the inducer motor, but could it be the main control board?

Tony Pullen

don't think so. if you get voltage to the motor and it doesn't run....gotta be the motor, I would think.

carmon

I concure 115 volts to motor ad it does not run........ i would sugegst a new motor

the_dude

your presure switch closes with the IDM dosnt even turn? is it stuck close. some cpu logic wants to see that switch open before start up.

eidson

15yr furnace I would say bad motor. like one other said if you are getting 115 at the motor when it"s calling and does nothing motor is bad.